DE202018004631U1 - Frame, especially in the form of a tripod - Google Patents

Abstract

Frame, in particular in the form of a tripod, with a plurality of rod-like legs, which are centrally mounted on a connecting part, wherein the frame is collapsible into a space-saving transport position, in which the legs are aligned substantially parallel, and the frame is foldable into a use position in which the legs are aligned, characterized in that between the legs (2) at least one concavely rounded support surface (5) for surface support of the leg surface is arranged, in particular two such support surfaces (5, 5 ') are provided which the respective surface of the surface in use position touching each other flatly.

Description

The present invention relates to a frame, in particular in the form of a tripod, according to the preamble features of claim 1.

Tripods have been known for many years, e.g. to keep a grill grate adjustable in height over a campfire. Tripods are also used on camping chairs or outdoor tables, as they are not statically overdetermined, unlike four-legged furniture. A version of a tripod for the barbecue area is z. B. at the Fa. Cathara-design.com available. Here, the metal rods are guided by a metal ring, and thus can be folded into a space-saving transport position in which the legs are largely aligned parallel. In the grill or general use position, the rods are unfolded, so the legs crossed aligned. However, this frame is relatively unstable, since this can easily fall over by bumping against the metal rods.

This also applies to frames in which the (three) legs are supported by an approximately centrally arranged connection block. Such a construction is in U.S. Patent 4,934,638 described, wherein at the upper end a seat is spanned, which is bolted to the upper ends of the telescopic tubes there. This is relatively expensive, especially in the unloaded state, the risk of unintentional repelling continues. In addition, premature wear is to be feared, since the pins are highly loaded at the rotational or connection point, as are the tubular legs in this area, so that relatively thick-walled and thus heavy rods seem necessary.

The invention is therefore an object of the invention to improve a frame, in particular a tripod in terms of stability, safety and construction costs.

This object is achieved with a frame according to the features of claim 1. Preferred embodiments are subject of the dependent claims.

The proposed construction gives the frame, especially in the form of a tripod a particularly stable structure and high resilience, since the surface pressure can be significantly reduced by the concave, especially adapted to the leg surface support surfaces and thus reduces the wear of frequent use or heavy load becomes. The legs are thus supported on the corresponding support surfaces from each other, so that no further struts are required. In kinematic reversal, these concave support surfaces can also be arranged on the legs themselves and the corresponding surfaces on the connecting part. Generally, however, the formation of the concave support surfaces is preferred at the central connecting part, as this rounded bearing surfaces for the legs in the folded transport position, preferably as a metal casting easy to shape and produce. The connecting part can in this case be made in a particularly viable manner as a closed metal ring, in which the corresponding number of passages (usually three or four) are formed for the legs.

The proposed frame, especially in the form of a tripod, is suitable for many applications with increased attachment of equipment in the upper frame area over the connecting part, z. B. for a grill or fire bowl. But there may also be arranged sitting or table surface or a bucket, especially a plant or beverage refrigerated bucket, or a ball, in particular a light ball are used to be stored securely between the upper parts of the rod-like legs. These devices can be easily pivoted in the frame over the stable connection node in an advantageous manner to z. B. to change the heat radiation of a fire bowl, with no attachment needs to be solved. The central attachment of the legs on the connecting part, the frame can be easily folded into a space-saving transport position, the legs are largely aligned parallel to each other so as to be stored compact. Here, one of the support surfaces acts as latching or positioning. For use, for. B. with the aforementioned devices, the frame can be quickly and easily unfolded in a stable use position in which the legs are aligned crossed. The provided between the legs, concave support surfaces (in a tripod thus six support surfaces) an exact positioning and a secure stand of the frame is achieved.

Preferably, the respective two support surfaces per leg directly adjacent to each other, so that their fillets merge into each other. There at the transition can preferably each be arranged a pin on which the legs can be securely screwed. The tubular legs are in particular made of light metal (aluminum) and stiffened to increase the stability in the region of the connecting part or the connecting pin, in particular with a metal insert or in each case a bushing, which preferably extends in the axial direction of the connecting screw. Thus, stable bolts are screwed with a flat head in the legs in recessed form from the outside, preferably in the largely radially extending pin. It can be arranged on the bolt and a spring, in particular plate spring or the Beinwandung in the contact surfaces are designed slightly more flexible to facilitate the transition between utility and transport position (and vice versa), especially if there for the exact positioning of the legs either in the Transport or use position a slightly projecting latch is provided. This positive "locking" between the two positions of the legs is preferably designed as a gusset-like locking lug. However, if the positioning in the transport position should be emphasized more strongly, the latch is aligned in each case parallel to the legs or alternatively, parallel to the folded leg position in use position. Advantageously, the legs are designed in several parts, in particular extendable with quick or screw, so as to reduce the pack size of the frame z. B. to keep compact when shipping. In addition, so that the height of the frame is easily changed, z. B. from table height to chair height, screwed in the additional rods or clicked. If z. B. on the tripod in the lower part three rods each 50 cm in length existing legs are screwed, results in an elevated position z. B. when used with a light or ball of light. This extension can also be done with pipes made of plastic or wood rods, wherein the (middle) area at the connecting part (possibly with said metal inserts) made of metal, in cooperation with the support surfaces to ensure the desired carrying capacity.

• 1 ein Gestell in Form eines Dreibeins in drei Darstellungen (1a, 1b und 1c);
• 2 eine Draufsicht auf das Gestell in Transportstellung (gemäß 1b);
• 3 eine Perspektivansicht auf das zentrale Verbindungsteil;
• 4 eine ähnliche Ansicht wie 3, mit einem weggelassenen Bein;
• 5 einen Querschnitt durch ein Bein mit Verschraubung;
• 6 zwei abgewandelte Ausführungen von Rastnasen am Verbindungsteil;
• 7 ein ringförmiges Verbindungsteil; und
• 8 ein damit aufgebautes Gestell, wobei ein Bein zur Detailansicht weggelassen ist.

Hereinafter, preferred embodiments of the frame will be described with reference to the drawings. Hereby show:

• 1 a frame in the form of a tripod in three representations ( 1a . 1b and 1c );
• 2 a plan view of the frame in transport position (according to 1b) ;
• 3 a perspective view of the central connecting part;
• 4 a similar view as 3 with a dropped leg;
• 5 a cross section through a leg with screw;
• 6 two modified versions of locking lugs on the connecting part;
• 7 an annular connecting part; and
• 8th a frame constructed therewith, with one leg omitted for a detailed view.

In 1 is a frame 1 represented in the form of a tripod, which here three rod-shaped legs 2 has, which centrally at a connecting part 3 are attached. In 1a is the frame 1 unfolded in a use position in which the legs 2 aligned in the direction of space aligned with each other to z. B. a fire bowl 1a (see. 1c ) in the upper area. Here, the fire bowl 1a (Or a similar device, such as a light or a bucket for cooling drinks, etc.) also be swiveled as needed. In 1b is the frame 1 shown in its space-saving transport position, with the three legs 2 are folded in largely parallel orientation, if necessary to be stacked in a compact manner. Two end surfaces of the legs 2 are here with reference numerals 2 B provided to indicate quick or screw connections on which the legs 2 If necessary, can be extended to z. B. to increase the parking height. So the fire bowl according to 1c be arranged elevated. The quick or screw connection 2 B However, it can also be closer to the connection part 3 arranged as in 1c indicated in dashed lines. This can help the legs 2 in particular in the transport position according to 1b be shortened so as to take smaller pack sizes. The part-legs 2 can also be made of wood rods or plastic pipes, while the central area is made of metal for stability reasons generally.

As in 2 shown are at the connecting part 3 or the (three) legs 2 two concave support surfaces each 5 . 5 ' provided to which the outer surface of the legs 2 can nestle alternately in the use position, the surface pressure is significantly reduced at these contact surfaces and thus the frame 1 is highly resilient. In the transport position shown here, ie with a plan view according to 1b on the top of the connecting part 3 , lie the (convex) outer surfaces of the tubular legs 2 in a similarly shaped, concave storage area 5a and are positioned by it. In the transition to the use position (cf. 3 ) become the surfaces of the legs 2 over slight elevations in the form of locking lugs 5b twisted, then at the concave support surfaces 5 . 5 ' to be attached and thus anchored in a form-fitting manner. To clarify here below between the upper support surfaces 5 and the lower support surfaces 5 ' differentiated, the corresponding per leg 2 are arranged.

As in 3 shown, the entanglement takes place in the use position by turning the legs 2 , here around radially aligned pins 4 , each between the rounded support surfaces 5 and 5 ' are arranged, preferably adjacent to said locking lugs 5b (see also 6 ). The legs 2 (here is the front leg for better representation of the pin 4 omitted) are preferably made of light metal tubes, as shown shaded slightly. To increase the stability of the frame 1 can the tubular legs 2 in the area of the connecting part 3 are stiffened, especially with a metal insert 2a or a socket (cf. 5 ). In these cones 4 can screw bolts from the outside 4a (see also 1a) with a flat head 4b be screwed in, so as to ensure a flush, secure mounting in a recessed manner. The connecting part 3 is preferably produced as a metal casting, in particular together with radially aligned pin 4 or similar fasteners, as in 4 is shown in slightly different perspective.

In 4 is also the transition between the respective concave fillets visible, as well as the intermediate locking lug 5b , which is here shaped like a gore, to each in the use position ( 1a) , but also in the transport position ( 1b) to form a "positioning stop" for the pipe surface applied there. Thus, an exact positioning for the legs 2 and fitting system either on the storage area 5a or in the (upper) support surface 5 depending on the desired position (according to 1a or 1b) achieved. In the use position, however, the rod or leg surface touches not only the here overhead support surface 5 but also the rotationally symmetric to the axis of the pin 4 arranged lower support surface 5 ' , As a result, the surface pressure is significantly reduced and increases the load capacity.

In other words, extends - viewed in the axial direction of the pin 4 - the upper support surface 5 analogous to a dial in the range of about 0 o'clock to 3 o'clock and the lower supporting surface 5 ' from about 6 o'clock to 9 o'clock. Like the one with a flat head 4b fastened leg 2 As can be seen, the leg surface nestles perfectly against the correspondingly rounded support surface 5 ' at. It should be noted that despite the relatively low material thickness of the connecting part 3 between the two support surfaces 5 and 5 ' a high stability is given, since the support forces at this point (on the support surface 5 largely directed downwards and on the support surface 5 ' directed upward) practically cancel.

In 5 is a cross section through a tubular leg 2 at the height of the connecting part 3 shown, wherein the cut surface by the inclined orientation of the leg (corresponding 1a) appears elliptical. It should be noted that the leg cross-section is not limited to a cylindrical shape, but z. B can also be elliptical or polygon, in which case the shape of the support surfaces 5 . 5 ' is adjusted accordingly. For axially somewhat yielding attachment is here between the pin 4 and the bolt 4a a feather 4c (In particular a disc spring) arranged so that the outer surface of the leg 2 at the transition between storage area 5a and support surface 5 (or vice versa) smoother on the locking lug 5b slides. This can also be achieved by a segmented metal insert 2a be solved, so that there is a certain pipe deformation. Likewise, the material cross section could be weakened towards the latch, z. B. by a ground flattening, which is the flexural strength of the leg 2 and the flat contact with the support surfaces 5 . 5 ' not impaired. Although here the concave support surfaces 5 . 5 ' depending on the connecting part 3 is shown to coincide with the convex outer surface of each leg 2 to cooperate, can - in kinematic reversal - the support surfaces also on each leg 2 be formed, in which case the correspondingly adapted convex shape on the connecting part 3 would be shaped.

In 6 are two alternatives to the above-described gusset shape of the detent 5b between the support surfaces 5 and 5a shown. So is the catch in the upper view 5b each parallel to the legs 3 in transport position (cf. 1b) aligned, while in the lower part of the drawing, the alignment parallel to the legs 3 in use position ( 1a or 1c ) is designed.

In 7 the connection part is shown in a particularly stable design as a closed ring in which three passages are provided in a tripod. These each have the (upper) support surface 5 and also rounded (lower) support surface 5 ' on, which can be seen here on the left passage. As mentioned above, when viewed along the arrow 4a (For the screwing of a here sufficient grub screw for prefixing the respective leg) the support surface 5 in the first quadrant and the support surface 5 ' settled in the third quadrant of an imaginary dial or coordinate system.

In 8th is shown a frame constructed in such a way, with a leg is left to the arrangement of the two support surfaces 5 and 5 ' to clarify in the above manner. By the apparent "fitting" of the leg surface on both, almost opposite support surfaces 5 and 5 ' This results in a particularly high load capacity of the frame thus formed.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• US 4934638 [0003]

Claims (14)

Frame, in particular in the form of a tripod, with a plurality of rod-like legs, which are centrally mounted on a connecting part, wherein the frame is collapsible into a space-saving transport position, in which the legs are aligned substantially parallel, and the frame is foldable into a use position in which the legs are aligned, characterized in that between the legs (2) at least one concavely rounded support surface (5) for surface support of the leg surface is arranged, in particular two such support surfaces (5, 5 ') are provided which the respective surface of the surface in use position touching each other flatly. Rack after Claim 1 , characterized in that the support surfaces (5, 5 ') in each case on the connecting part (3) is formed. Rack after Claim 1 , characterized in that the support surfaces (5, 5 ') respectively formed on the legs (2). Frame after one of the Claims 1 to 3 , characterized in that the support surfaces (5, 5 ') adjoin one another. Frame after one of the Claims 1 to 4 , characterized in that between the support surfaces (5, 5 ') each have a pin (4) is arranged, which is preferably aligned radially. Frame after one of the Claims 1 to 5 , characterized in that a plurality of tubular legs (2), in particular made of light metal on the connecting part (3) are arranged. Frame after one of the Claims 1 to 6 , characterized in that the legs (2) are stiffened in the region of the connecting part (3), in particular with a metal insert (2a), a bush or an intermediate piece. Frame after one of the Claims 1 to 7 , characterized in that in the legs (2) from the outside screw bolts (4a) are screwed, in particular with a flat head (4b) in a largely flush arrangement. Rack after Claim 8 , characterized in that on the screw bolt (4a) a spring (4c), in particular disc spring is arranged. Frame after one of the Claims 1 to 9 , characterized in that the connecting part (3) is formed as a metal casting, in particular is closed annularly. Frame after one of the Claims 1 to 10 , characterized in that in the upper part above the connecting part (3) is a grill or fire bowl (1a) can be used, or in the upper part of a seat or table surface or a bucket, especially a plant or beverage refrigerated bucket, or a lamp , In particular, a light ball is arranged. Frame after one of the Claims 1 to 11 , characterized in that between the support surfaces (5, 5 ') and a bearing surface (5a) a latching lug (5b) is formed, which is preferably formed like a gore or parallel to the legs (2) in transport position ( 1b) or respectively parallel to the legs (3) in use position ( 1a) is aligned. Frame after one of the Claims 1 to 11 , characterized in that the legs (2) are of multi-part design, in particular with quick or screw connections (2b) are extendable. Frame after one of the Claims 1 to 11 , characterized in that the leg surface has different compressive strength, in particular to the center of the connecting part (3) is designed towards compliant.

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